T Ursae Minoris

T Ursae Minoris

A visual band light curve for T Ursae Minoris, adapted from Uttenthaler et al. (2011)[1]
Observation data
Epoch J2000.0      Equinox J2000.0
Constellation Ursa Minor
Right ascension 13h 34m 41.072s[2]
Declination +73° 25′ 53.08″[2]
Apparent magnitude (V) 7.8 - 15[3]
Characteristics
Spectral type M4e-M6e[3]
Variable type SR (previously Mira)[1]
Astrometry
Radial velocity (Rv)−9[4] km/s
Proper motion (μ) RA: −12.919[2] mas/yr
Dec.: +5.826[2] mas/yr
Parallax (π)0.7843 ± 0.0502 mas[2]
Distance4,200 ± 300 ly
(1,280 ± 80 pc)
Details
Before onset of period change
Mass1.66±0.10[5] M☉
Radius290±15[5] R☉
Luminosity4,080[6] L☉
Temperature3,200±30[5] K
Metallicity [Fe/H]−0.07[5] dex
Age0.17±0.21[5] Gyr
Other designations
T UMi, Gaia DR2 1688437478979868288, HD 118556, TYC 4408-163-1, GSC 04408-00163, 2MASS J13344108+7325530[7]
Database references
SIMBADdata

T Ursae Minoris (T UMi) is a variable star in the constellation Ursa Minor, located 2′30″ west-southwest of 3 Ursae Minoris toward the western border of the constellation with Draco.[8]

  1. ^ a b Cite error: The named reference Uttenthaler was invoked but never defined (see the help page).
  2. ^ a b c d e Brown, A. G. A.; et al. (Gaia collaboration) (August 2018). "Gaia Data Release 2: Summary of the contents and survey properties". Astronomy & Astrophysics. 616. A1. arXiv:1804.09365. Bibcode:2018A&A...616A...1G. doi:10.1051/0004-6361/201833051. Gaia DR2 record for this source at VizieR.
  3. ^ a b Cite error: The named reference AAVSOt was invoked but never defined (see the help page).
  4. ^ Feast, Michael W.; Whitelock, Patricia A. (2000). "Mira kinematics from Hipparcos data: A Galactic bar to beyond the Solar circle". Monthly Notices of the Royal Astronomical Society. 317 (2): 460. arXiv:astro-ph/0004107. Bibcode:2000MNRAS.317..460F. doi:10.1046/j.1365-8711.2000.03629.x. S2CID 123295862.
  5. ^ a b c d e Molnár, László; Joyce, Meridith; Kiss, László L. (2019). "Stellar Evolution in Real Time: Models Consistent with the Direct Observation of a Thermal Pulse in T Ursae Minoris". The Astrophysical Journal. 879 (1): 62. arXiv:1905.00597. Bibcode:2019ApJ...879...62M. doi:10.3847/1538-4357/ab22a5. S2CID 143424083.
  6. ^ Fadeyev, Yu. A. (2018). "A Model of the Mira–Type Star T UMi". Astronomy Letters. 44 (8–9): 546–553. arXiv:1803.11387. Bibcode:2018AstL...44..546F. doi:10.1134/S1063773718070010. S2CID 119283616.
  7. ^ "V* T UMi". SIMBAD. Centre de données astronomiques de Strasbourg. Retrieved 18 May 2014.
  8. ^ Simpson, Phil (2012). Guidebook to the Constellations: Telescopic Sights, Tales, and Myths. Springer. pp. 22–23. ISBN 978-1-4419-6941-5.